Making A Menu Item Display A Window.

Question

I have made some code to do this, but as It doesn't work. I am only a beginner so I may be doing this completely wrong or i may have missed something out. Either way please tell me. Here is the code I have got.

[item setAction:(SEL)action {
     [window makeKeyAndOrderFront:NSApp];
    }

Answer 1

The SEL data type refers to a selector, which is a way of referring to a method in a class. What you have to do is define a method in your target object's class:

- (void)doSomething:(id)sender {
    [window makeKeyAndOrderFront:sender];
}

and call your control's setAction: method like this:

[item setAction:@selector(doSomething:)];

It looks like you need to bone up on the basics of Cocoa, however. May I suggest Apple's Getting Started guide

Answer 2

It looks like you're trying to make an anonymous funtion. AFAIK, Obj-C has no support for these. Basically want you want to do is define action as a proper method:

[item setAction:@selector(action:)];

…

-(void)action:(id)sender{  
    [window makeKeyAndOrderFront:self];  
}

Also, I'm not sure why you're passing NSApp to makeKeyAndOrderFront:. The full signature is - (void)makeKeyAndOrderFront:(id)sender, so passing self is usually most appropriate (although I'm not even sure what that input does!).

I suggest you work through a few tutorials to familiarize yourself with Obj-C and Cocoa.